The first photo shows the hull with the gelcoat and the first layer of fiber installed. They install a clear not gelcoat on the bottom so they can do post infusion quality control checks. The green you see is the mold. The visible bumps in the hull create a recess to allow any though hull items to be installed flush with the hull. That’s Guillaume with the blue gloves and Bertrand at Pogo
Once the outer layer of glass is in they install PVC Foam